Circuit-breaker.



C. AMBRUSTER. CIRCUIT BRBAKBR. APPLICATION FILED NOV. 9, 1909.

1,042,186.v Patented 00t.22,1912.

UNITED STATES PATENT OFFICE.

CORNELIUS AMBRUSTER, F CHICAGG, ILLINOIS.

CIRCUIT-BREAKER.

To all whom it may concern:

Be it known that I, CORNELIUS AMRUsrnn, a citizen of the United States, residing at the city of Chicago', in the count-y of Cook and State of Illinois, have invented. a certain new and useful Improvement in Circuit-Breakers, of' which the following is a illustration in the accompanying drawings in WhiclL- j Figure 1, is a front view of a well known ty e of circuit breaker shown in closed position and fitted or provided with an attachment embodying features of the invention, Fig.l 2, is a similar viewdrawn to an enlarged scale and illust-rating features of the invention, Fig. 3 is a section taken parallel with the plane of the paper and drawn to an enlarged scale and showing one way of con necting the upper end of the link and a movable part of the circuit breakenand Fig. 4 is a transverse sectional view drawn to an enlarged scale and showing one way of, connecting the lower end of the link to one arm of the bell-crank lever.

In the drawings 1, is the tripping armature of the circuit breaker which is shown as of the General Electric type and is well understood. v j

2, is a latch att-ached to this amature and the latter is shown as provided with a tapered dowel pin 3. f

' 4, is a hollow shell or carrier asof aluminum pivoted at one endtothe pin 5, on which the tripping'. armature l, turns.

6, is a tapered recess in the shell which receives the dowel 3. The dowel and recess serve to keep the parte 1 and 4, lined up with each other.

i, is a trigger turnin on a in 8, inserted in a slot in the midde of t e end of the shell. 4. This trig r 7, engages with the latch 2, when the s ell 4, is raised intocca- Specicaton of Letters Patent.

Application led November 9,1909. Serial No. 526,987.

Patented Oct. 22,1912.

tact with the armature l. A spring 9, is` shown as arranged behind the trigger 7, for bringing about itsv engagement with the latch The trigger, as has been-said, is pivotcd at S, intermediate of its length. (lne end engages the latch 2, and the other end is provided with a projection 10, that extends at right-angles to the vplane oi" the trigger so as to be in position for engagement withthe arm 1l, of4 a bell crank lever which is pivoted to the stud 12, and the stud 12, is fastened as to the. switchboardl under the breaker. The other arm 13, of the bell crank lever is arranged near the end of the stud 1Q, and further out on thestud 12, tlian'istlie arm 11, so that the end of the projection 10, is in position for engaging with the edoe of the arm 11, but will pass clear of the rm 13.

14, is a link extending from the arm 13, to the arm 15, of the circuit breaker which.

arm l5, moves downward when the breaker opens. The connection to the army 15 is shown in Fig. 3 and the connect-ion to the arm 13 is shown in Fig. 4. In each case the edge wall of t-he opening in the'link is round-y ed so as to provide for sufficient universal motion for accommodating the movement of the parts. 16, is a weight as of lead which can be moved toward or away from the pivot or r hinge 5, by turning the screw 17, shown as mounted in the casing 4, and provided with a thumb nut 18. v

19, is a slot formed in the 'casing 4,' and thro-ugh which extends apointer 20, attached to the Weight, and by means of this pointer and the scale 2l, the percentage of overload for which the weight- 16, is set, can be` read.v

When the circuit breaker is open, thenlink 14, brings the bell` crank into such position that the edge, that is the left-hand edge, ot

`the arm l1, stands in such position that the projection 10, ,being forced outward andk thus withdrawing the trigger' 7, into the shell 4, Wouldtravel along it if the shell 4,

were raised and maintain the trigger in the same yrelative position to the shell 4, thusy lpreventing thev trigger from engaging t e latch. I As a result of .this construction and arrangement it follows that it is impossible to'connect the shell 4, and

weight which it carries with the armature l, when the circuit breaker is open. When the circuit breaker iis closed, thelink 14, brings the bell crank into a position indicated by dotted lines and in this position the edge oi the arm ll, clears the projection 10, so that the trigger is tree to engage the latch when the shell i, is turned up. As a result of this construction the shell 4, and its weight can be connected with the armature l, when the circuit breaker is closed by the simple operation of turning the casing upward. lVhen the shell 4, is hung 0n the armature l, there is given an overload setting dependent upon the proportion ot the moments ot the armature and of the weight and shell about the hinge 5. This proportion can be altered or adjusted by turning the screw l?, and mo\ ulg the weight 1G, in

and out. lllhenever the circuit breaker is opened either by an overload or by hand, the link ll. moves the bell crank into position for bringing Vits arm ll, in Contact with the projection lt), thus tripping the trigger and discngaging the shell and weight from the armature l, and allowing the shell and weight to fall back onto the stud l2, into inactive position. '22, is a rubber button for cushioning this blow. As the left hand surface of the arm ll, ,when the breaker is'open follows an arc of a circle about the point 5, as a center, the trigger will be tripped no matter what the position of the shell 4, may be. the radius of said arc being of such length as to force the projection. 10, of the trigger' Outward and thus withdraw the trigger 7, into the shell el, so that said trigger cannot engage with the latch 2. This enables the armature of the circuit breaker to be set at any point within the rangeof the breaker without having to niakevany adjustments of the emergency attachment.

There are conditions usually caused by a breakdown which necessitates the emergency use of a piece of apparatus such as a storage battery at a much higher rate than the circuit breakers are set to carry. The present invention provides a means for attaching during such emergency time an extra weight to the tripping armature of the circuit breaker' so that the circuit breaker will not trip at its usual point but at a point above which the apparatus would be endangered. Furthermore the emergency attachnicnt of the present invention can be previously adjusted to limit the overload capacity and this emergency attachment is automatically restoredto inactive position whenever the circuit breaker is opened either by hand or by an overload, thus rendering the device what might be called fool-proof.

W'hat l claim is:

1`. The combination with a circuit breaker having a tripping armature and a part Whiclrmoves when the breaker opens, of a member `for increasing thc weight ot1 the'r armature, a catch bv nnan-z ot which said from the armature, and tripping means operated by said'part and adapted to un tasten the catch when the circuit breaker is open or opens.

2. The combination of a circuit breaker having a pivotal tripping armature and a part which moves when the breaker opens, a member pivoted concentrically with the armature, a catch for connecting and disconnecting the free ends of the armature and member, and tripping mechanism connected with said' part and adapted to untasten said catch when the breaker is open or opens and to permit of its fastening when the breaker is closed.

3. The combination of a circuit breaker having a pivotal tripping armatureand a part which moves when the breaker opens, a member pivoted concentrically with the armature, a catch :tor connecting and disconnecting the free ends of the armature and member, tripping mechanism connected with said part and adapted to unfasten said catch when the breaker is open or opens and to permit of its fastening when the breaker is closed, and a Weight adjustably carried by said member. j

4. The combination of a circuit breaker having a pivotal tripping armature and a part which moves when the breaker opens, a member pivoted concentrically with the armature, a catch for connecting and disconnecting the free ends of the armature and member, tripping mechanism 'connected with vsaid parts and adapted to unfasten said catch when the breaker opens and to permit of its fastening when the breaker is closed, a weight adj ustably carried by said member, and a scale and pointer for indicating the position of the weight.

5. The combination of a circuit breaker having a pivotal tripping armature and a part which moves when the circuit breaker opens, a pivotal member adapted to be connected with the armature to increase its weight', a stud for supporting said member in inactive position, a catch for connecting and disconnecting the armature and member, a bell crank lever pivoted to the stud, and a link connected with said partand one arm of the bell crank lever and the other arm of said lever operating to unfasten the atch when the breaker is open or opens and to permit the catch to fasten When the breaker is closed.

6. An attachment for circuit breakers comprising a member provided at one end with one element of a pivotal connection and at the other end with a trigger, a latch with which the trigger cojieratcs, a bell crank lever and means for pivotally supporting it,

and a link connected with one arm of the bell crank lever and the other arm of the bell crank lever arranged to 'coiiperate with the trigger.

A7. The .combination of a circuit breaker having a pivotal tripping armature provided with a latch and a dowel pin, a fixed stud, a shell having one end pivotedI con centrically with the armature and provided with an opening4 for the reception of the doWel pin and adapted to rest on said stud, a spring actuated trigger pivotally mounted inthe free end of the shell and adapted to coperatc With said latch4 and provided with 'a projection, a bell crank lever pvotally mounted on the stud and having one of its arms adapted to cooperate with said projection, a link connected with the other arm of the bell crank lever and With a movable and armature, and additional means for. au-

Uopies of this patent may be obtained for tomatically disconnecting said member and armature when the circuit breaker opens, substantially as described.

9. The combination With a circuit breaker haVinga tripping armature and a part which moves when the breaker opens, of a device for increasing the Weight of the armature, means for attaching the armature and said device, and means responsive to the. movement of the said moving part and adapted to permit of the attachment of the device to the armature when the` breaker is closed and for automatically detaching the five cents each, by addressing the kGommtsioner of Patents. Washington, D. C. 

